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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 481 · 40 questions
TalentJR

The trick (Count the places): Forget the points and multiply the whole numbers. Count all the digits after the points in the question. Put the point that many places from the right, then check by rounding.

NameDateTime takenScore ___ / 40
  1. 1.4.3 × 34 — where does the decimal point go? (a) 146.2 (b) 14.62 (c) 1.462 (d) 1462
  2. 2.3.5 × 13 — where does the decimal point go? (a) 0.455 (b) 45.5 (c) 4.55 (d) 455
  3. 3.0.59 × 6 — where does the decimal point go? (a) 3.54 (b) 0.354 (c) 0.0354 (d) 35.4
  4. 4.0.84 × 12 — where does the decimal point go? (a) 100.8 (b) 0.1008 (c) 10.08 (d) 1.008
  5. 5.9.4 × 3.1 — where does the decimal point go? (a) 29.14 (b) 2.914 (c) 0.2914 (d) 291.4
  6. 6.0.42 × 0.2 — where does the decimal point go? (a) 0.084 (b) 0.0084 (c) 0.84 (d) 0.00084
  7. 7.0.69 × 24 — where does the decimal point go? (a) 1.656 (b) 0.1656 (c) 165.6 (d) 16.56
  8. 8.0.94 × 42 — where does the decimal point go? (a) 3.948 (b) 0.3948 (c) 394.8 (d) 39.48
  9. 9.0.46 × 4.2 — where does the decimal point go? (a) 19.32 (b) 0.1932 (c) 0.01932 (d) 1.932
  10. 10.7.7 × 5 — where does the decimal point go? (a) 0.385 (b) 38.5 (c) 385 (d) 3.85
  11. 11.0.87 × 3 — where does the decimal point go? (a) 2.61 (b) 0.261 (c) 0.0261 (d) 26.1
  12. 12.3.9 × 0.4 — where does the decimal point go? (a) 15.6 (b) 1.56 (c) 0.0156 (d) 0.156
  13. 13.0.15 × 0.7 — where does the decimal point go? (a) 0.105 (b) 0.0105 (c) 1.05 (d) 0.00105
  14. 14.6.2 × 34 — where does the decimal point go? (a) 21.08 (b) 210.8 (c) 2.108 (d) 2108
  15. 15.2.6 × 0.3 — where does the decimal point go? (a) 0.0078 (b) 0.078 (c) 7.8 (d) 0.78
  16. 16.2.5 × 31 — where does the decimal point go? (a) 77.5 (b) 775 (c) 7.75 (d) 0.775
  17. 17.0.28 × 47 — where does the decimal point go? (a) 13.16 (b) 1.316 (c) 0.1316 (d) 131.6
  18. 18.0.48 × 11 — where does the decimal point go? (a) 0.0528 (b) 0.528 (c) 52.8 (d) 5.28
  19. 19.7.7 × 2.8 — where does the decimal point go? (a) 0.2156 (b) 215.6 (c) 2.156 (d) 21.56
  20. 20.0.51 × 13 — where does the decimal point go? (a) 66.3 (b) 6.63 (c) 0.0663 (d) 0.663
  21. 21.3.8 × 4.1 — where does the decimal point go? (a) 0.1558 (b) 155.8 (c) 1.558 (d) 15.58
  22. 22.3.3 × 5 — where does the decimal point go? (a) 165 (b) 1.65 (c) 16.5 (d) 0.165
  23. 23.4.4 × 4.1 — where does the decimal point go? (a) 1.804 (b) 180.4 (c) 18.04 (d) 0.1804
  24. 24.4.9 × 3.8 — where does the decimal point go? (a) 18.62 (b) 1.862 (c) 0.1862 (d) 186.2
  25. 25.0.52 × 17 — where does the decimal point go? (a) 8.84 (b) 0.884 (c) 0.0884 (d) 88.4
  26. 26.0.54 × 3 — where does the decimal point go? (a) 0.162 (b) 16.2 (c) 1.62 (d) 0.0162
  27. 27.0.77 × 8 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 0.0616 (d) 61.6
  28. 28.2.9 × 16 — where does the decimal point go? (a) 46.4 (b) 4.64 (c) 0.464 (d) 464
  29. 29.9.2 × 9 — where does the decimal point go? (a) 828 (b) 8.28 (c) 82.8 (d) 0.828
  30. 30.7.7 × 4.9 — where does the decimal point go? (a) 37.73 (b) 0.3773 (c) 3.773 (d) 377.3
  31. 31.0.43 × 6 — where does the decimal point go? (a) 0.258 (b) 2.58 (c) 0.0258 (d) 25.8
  32. 32.8.7 × 2 — where does the decimal point go? (a) 1.74 (b) 174 (c) 0.174 (d) 17.4
  33. 33.0.37 × 1.9 — where does the decimal point go? (a) 0.00703 (b) 7.03 (c) 0.703 (d) 0.0703
  34. 34.5.4 × 4.7 — where does the decimal point go? (a) 0.2538 (b) 2.538 (c) 25.38 (d) 253.8
  35. 35.2.7 × 0.2 — where does the decimal point go? (a) 0.54 (b) 0.0054 (c) 0.054 (d) 5.4
  36. 36.0.83 × 34 — where does the decimal point go? (a) 28.22 (b) 282.2 (c) 0.2822 (d) 2.822
  37. 37.0.19 × 3 — where does the decimal point go? (a) 0.057 (b) 5.7 (c) 0.0057 (d) 0.57
  38. 38.0.64 × 3 — where does the decimal point go? (a) 0.0192 (b) 19.2 (c) 0.192 (d) 1.92
  39. 39.3.6 × 46 — where does the decimal point go? (a) 1656 (b) 165.6 (c) 1.656 (d) 16.56
  40. 40.0.67 × 3 — where does the decimal point go? (a) 0.0201 (b) 20.1 (c) 2.01 (d) 0.201

Answer key

  1. 146.2
  2. 45.5
  3. 3.54
  4. 10.08
  5. 29.14
  6. 0.084
  7. 16.56
  8. 39.48
  9. 1.932
  10. 38.5
  11. 2.61
  12. 1.56
  13. 0.105
  14. 210.8
  15. 0.78
  16. 77.5
  17. 13.16
  18. 5.28
  19. 21.56
  20. 6.63
  21. 15.58
  22. 16.5
  23. 18.04
  24. 18.62
  25. 8.84
  26. 1.62
  27. 6.16
  28. 46.4
  29. 82.8
  30. 37.73
  31. 2.58
  32. 17.4
  33. 0.703
  34. 25.38
  35. 0.54
  36. 28.22
  37. 0.57
  38. 1.92
  39. 165.6
  40. 2.01

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